US1285644A - Deep-well pump. - Google Patents

Description

W. A. DOBLE & 0. JACOBSEN.

DEEP WELL PUMP.

APPLICATION FILED ocT.25.1915.

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W. A. DOBLE L 0'. JACOBSEN.

DEEP WELL PUMP.

APPLICATION F|LED OCT. 25,1915. 1,285,644. Patented Nov. 26, 1918.

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- W. A. DOBLE & 0.1ACOBSEN.

DEEP WELL PUMP.

APrvLlcATloN FILED ocT. 25, 1915.

Patented Nov. 26, 1918.

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W. A. DOBLE & 0. JACOBSEN.

DEEP WELL PUMP.

APPLICATION FILED oc. 25. 1915.

1,285,644. Patented Nov. 26, 1918.

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/1'/fa//I L BYMW v l EZATToRNEYS DEEP-WELL PUMP.

Specification of Letters Patent.

Patented Nov. 2e, 1918.

Application led October 25, 1915.'k Serial No. 57,716.

To all whom t may concern.'

Be it known that we, WILLIAM A. DOBLE, a citizen of the.United States, and OYSTEIVN JAcoBsEN, a subject of the King of Norway, residents of the city and county of San Francisco, State of California, have invented certain new and useful Improvements in Deep-Well Pumps, of which the following is a specification.

The invention relates to deep well pumps` and particularly-to the automatic, lubrication of bearings and the automatic hydraulic balance of the runners in such pumps.

An object of the invention is to provide for successful automatic water lubrication of the pump and pump shaft.

Another object of the invention is to provide means whereby the bearings 'are flushed with water continuously during the operation of the pump, to prevent the accumulation of any particles of grit in the bearings.

-A further object of the inventionis to provide automatic hydraulic balance means for the runner.

The invention possesses other advantageous features, some of which with the foregoing, will be set forth at length inthe following description where we shall out line in full that form of the invention which we have selected for illustration in the drawings accompanying and forming part of the present specification. In the drawings We have shown several specific forms of our generic invention, but it is to be understood that we do not limit ourselves to such forms because the' invention may be embodied in a multiplicity of forms, each being a species of the said invention. It is also to' be understood that by the claims succeeding the description of our invention, we desire to cover the invention in whatever form it lmay lbe embodied.

Considerable difhculty has been experienced in lubricating deep well centrifugal pumps onlaccount of the inaccessibility of the apparatus due to its position in deep bore holes. This diliculty has not only been overcome by ourl invention, but we have provided lubricating system which is automatic in operation not act to pollute the water being pumped. This is accomplished by employing water as the lubricating agent and by causing the found, however, that t lowed to accumulate and which does water `to flow in such quantity that the bearings are continually flushed. We have also provided ineans for the automatic Water lubr'tcation ofthe drive shaft bearings, so tha no lubricating oil or grease need be used on those parts of the pumping apparatus which are arranged within'- the. bore hole. The practice of using oil or grease as a lubricant is highly objectionable when, the water pumped is used by breweries, creameries or forpotable purposes, since no matter how care-l fully and accurately the pumps may be' constructed, the oil or grease will work its way out of the pump into the Water, and

even if the oil or grease is present in the water in comparatively small quantity, it is still highly objectionable. Water, and particularly the water taken directly from the well, often contains small particles of hard -or gritty substances, which, when the water is used as a lubricant, will come in contact with the bearings. We have if this grit is .not alin the bearings, that its presence is not deleterious and that it does not lact to cut the bearings. In order to prevent it from accumulating we supply suiicient Water to the bearing -so that it continually flushes therethrough, carrying the vgrit with it and preventing it from accumulating in pockets. Referring to the accompanying drawings:

Figure l is a vertical section of a deep well pump, casing and drive shaft conthe pump being water lubricated.

Fig. 2 is a vertical section of a portion of the well casing and pump casing, showing means for the automatic water cation of the drive shaft bearing.

F igf3 is a `vertical section of the pump, showing one form of water lubricated construction.

Fig. 4 is a similar view showing a modified form of water lubricated construction.

lFig. 5 is a similar view, showing means for counterbalancing the weight of the runner. v

Fig. 6 is a similar view showing a modified form of counterbalancing' means.

Fig, 7 is a similar view showing means for lubri- C atl 19 eXtends upward' alongside of the flangeY yto Fig. 8 is a top view of the runner shown in Fig. 7.

The pump is arranged within the well casing 2, ata suitable depthso that water may readily flow or be drawn into it by the rotation of the runner. The pump shell 3 is supported by the pump tube 4 which is supported at the upper end of the well and depends into the well and through this tube 4 the water is pumped to the surface. The drive shaft 5 is suitably supported at the upper end of the well and extends downward within the pump tube. Arranged within the pump tube and spaced apart therefrom, is an inner tube 6, which provides a smooth annular passage between it and the pump tube for the water being pumped. It is important that the passage through which the water is pumped be smooth, so that eddy currents and other disturbances may be avoided, since the presence of these disturbances reduces the efficiency of the pump. The pump casing 7 is provided with substantially vertical vanes 8 and the pump shell 3 is provided withvanes or ribs 9 which are of decreasing curvature upward. so that the water from the pump enters the annular passage in a substantially vertical direction and substantially free of disturbances.

A bearing 12 of the lower end of the pump shaft is arranged within the pump shell. The bearing 12 is preferably formed as a separate element and is pressed into the hub 13 ofy the pump shell or otherwise rigidly secured thereto. The pump shell is formed with an inner wall 14 which substantially parallels the outer wall, forming therebetween an annular passage for the water being pumped and the inner wall 1'4 and the hub supporting wall 15, form within the pump shell, a chamber 16 through which the drive shaft extends. `The inner wall 14 is provided with a depending flange '17 extending below the hub wall 15 and the flange 20 on the upper wall 18 of the conoidal runner 17 forming a running joint therewith. SecuredY to the bearing 12 or the inner wall 14 or other stationary part of the pump shell is a wall 21 which lies adjacent the other side of the wall 18 and forms a running oint therewith. The hub wall 15 is provided with apertures 22 which-establish communication between the pocket formed between the walls 17 and 21 and the chamber 16..

When the pump is operating, a pressure is produced at the periphery4 of the runner and this pressure forces water up through the joint between the flange 17 and the upper wall 18 of the runner, through the aper- Y tures 22 and into the chamber 16. The water thus circulated flows downward around the drive shaft through the grooves 23 in the bearing 12 maintalning perfect water lubrication of the bearing and flushing out any grit particles carried by the water. After passing through the bearing the water dis charges into the chamber 24 formed above the upper wall of the runner, whence, in the construction shown in Figs. 3 and 4, it is discharged into the runner by the vanes 25.

In Fig. 4 we have shown a shaft bearing 26 arr-angedbelow the hub 27 of the runner and have also provided means for the hydraulic lubrication and flushing of this bearing. A pipe 28 taps the chamber 16 at the level of the top of bearing 12 and conveys water into the bearing 26 at about the center, the bearing being provided with grooves 29 for distributing the water over the entire length of the bearing. The water which passes downwardly in the bearing discharges through the passage 31 and that which passes upwardly in the bearing discharges through the running joint between the runner hub and the exterior of the bearing.

In the construction shown in Fig. 1 the hub 13 is supported from the wall 14 by ribs 32, thereby eliminating the use of the hub wall 15, and the bearing flange 21 is supported from the bearing by suitable ribs. The lubricating water in this instance passes up through the running joint between the flange 17 and the flange 20,down between the flange 20 and flange 21 and thence up Y into chamber 16. After passing through the i bearing 12 the water discharges into a chamber 33 formed within the bearing structure, whencel it passes through the apertures 34 into the vchamber 24 formed betweenthe bearing structure and the upper wall of the runner. From here some of the water passes directly back into the chamber 16 through the aperture between the bearing structure and the flange 21 and some discharges through a variable aperture between the upper wall of the runner and the'y bearing structure and is driven into the runner by the Vane's 25. The purpose of the variable aperture and the chamber 24 will be set forth hereinafter..

Means are also provided for lubricating the bearings of the drive shaft 5. In Fig. 1 we have shown an .oil lubricated bearing and in Fig. 2 a water lubricated bearing, which is lubricated by the water in the well. Thewater tight, but is a sliding fit for the reasons heretofore set forth. Heretofore the Yso l,to

. strains set up therein cant it may be introduced pump. 'a passage 45 Awell and at the other end into the inner tube, the latter end being provided with a standpipe 46.- Water from the well `llft on @the runner. The

limer tube sections have been rigidly 'connected to ether for their entire length vand have thrown the pump out of alinement.

The bearing bushing. 41 is provided with one or more grooves 42 on its bearing surface through which the lubricating liquids flow. ,Through each beari g extends a passage 43 which is provided at its upper end with a short stand-pipe 44 through which any excess of lubricating liquid flows to the bearing below. When oil is used as a lubri! into theupper end We prefer, however, to employ water as the bearing lubricant since oil causes a contamination of the water being pumped and because a tube structure which prevents the entrance of water'. into the inner tube throws'unduestrains on the of the inner tube.

opening at one end into the passes through tube above the I caring and passes through the bearing, keeping it constantly fiushed. After passing the passage 45 into the inner .through thel bearing, the water descends t0l the bearing 'next below, and finally discharges into thewell or the pump runner. eans are also provided for counterbalancing the weight of the runner during the operation of the pump?. To relieve the counterbalancing means of thegweight ofthe f drive shaft and still allow the runner to move vertically through a limited'distance to vary the hydraulic counterbal'ancing pres'- sure, the drive shaft is divided at its lower end into two parts. The lower part 51 to which the' runner is securedA is connected t0' Vthe upper part of the shaft` by a coupling'52 which the lower portion is splined. When the pump is-notoperating, the runs on the step 53 arranged in the suction inlet (Fig. l) orupon some other portion of the pump shell. is operating the pressures produced in counerbalancing chambers raise the' runner and hold it in` suspension. which runner communicates with the interior. of' the runner at vthe inner or suction end ofthe runner vanes, so that a decrease of pressure is produced in the chamber which exerts a chamber 54 which occursbetween' the lower wall of therunner Extending through the spider 37 is When the pump' The cham/ber 24v occurs above the upper wall 18 ofthe forsaid 'shaft arranged and the pump shell receives water under" pressure from the runnerV discharge, thus producing al pressure in this chamber which exerts a lift on.the runner. For a substantially constant speed of the runner the pressure in chamber`54 is substantially constant,

and the pressure 1n chamber 24 is variable depending upon the vertical positionof the runner.

these chambers are not lsufficient to balance therunner, for various reasons, means are provided for producing a third upward pres- When the combined pressures inl sure. This means isshown in Figs. l and 6 and consists in of the upper wall of the runner beyond the an extension 55 outwardly.

vanes, so that an upward pressure is exerted l on this area.

In the constructions shown in' Figs.' 5 and 6, i'

with a hubl a passage 57 surrounding the Vanes 59 arranged in chamber58 the chamber 58.formed between The'water from chamber 24 discharges through the passage .between the hub 56 and therupper wall 18 .of the runnerand as the runner moves vertically the area of this passage is varied. When the runner raises to close the passage the pressure in chambery 24 increases, forcing the runner down, resulting in anopening of the passa-ge anda lowering of the pressure in the chamber. The runner adjusts itself vertically in balance and forces are counter'bal-anced byv variations in pressure in the chamber 24. I n the construction shown in Fig. 7, the upper wall of the runner is provided with a renewable wearing ring 6 1, whichis bolted to projections 62'on the runner. -In order to secure a peranyvariations in the downward.

fect operation of the runner, `it is necessary I'n the balancing that the runner begin dynamic balance. order to effect 'this balance, lugs or' projections62 areprovidedY and should-the runner be out of dynamic balance, the amountf metal necessary to secure this balance may be"A removed from'the proper projection or projections. These. projections are'spaced apart circumferentially: and their edges are curved so that' they form vanes' for discharging the water into the runner.

We claim:

l'. In a deep well pump,a drive shaft, an inner tube surrounding'said shaft, a bearing and means'for introducing water directly fromthewell into the tube above-said bearing for thepurpose of lubricating the bearing.l v

within said tube 2. In a deep well pump, .a drive shaft,a pump tube surrounding the shaft, a shaft bearing supported by said pump tube, an`

adjacent ends of the pump tube sections, a' .shaft bearing in said spider, an inner tube surrounding the shaft and engaging the outer surface of the bearing and a conduit extending through said spider and bearing land opening on one end`within the inner tube and at the other end within'the well for the' purpose of water lubricating said bearing.

4. In adeep well pump, a drive shaft, a pump tube formed in sections surrounding said shaft, a spider clamped between the adjacent ends of the pump tube sections, a shaft bearing in said spider having a grooved bearing surface, an inner tube surrounding the shaft and slidably engaging the outer surface of the bearing and a conduit extending from the exterior of the pump tube to the interior of the inner tube above the bearing for the purpose of conducting well water into the inner tube for lubricating the bearing.

5. In a deep well pump, a drive shaft, a pump tube, a pump casing attached to the pump tube, an inner tube surrounding the drive shaft and engaging the pump casing and a slidable joint in said inner tube.

6. In a deep well pump, a drive shaft, a pump casing, an inner tube surrounding the shaft and engaging the pump casing and a slidable joint in said inner tube.

7 In a deep well pump,^a drive shaft, a pump casing, abjaring for said drive shaft and an inner tube vsurrounding the shaft and slidably engaging said bearing and pump casing. y

8. In a deep well pump, a drive shaft, a pump casing into which said shaft extends,

a'bearing for said shaft and an inner tube surrounding the shaft and engaging the pump casing and forming a sliding joint with the bearing. y

9. In a deep well pump, a pumpshell having ai chamber therein', a drive shaft extending through said chamber, and a bearing for said shaft havirfg its upper end disposed in said achamber, said chamber being in communication with the pump chamber whereby water is introduced into said chamber for lubricating said bearing.

1'0. In 'a deep well pump, a pump shell having a chamber therein, a runner in said shell, a drive shaft attached to said runner, and a bearing for said shaft extending into said chamber, said shell beingprovided with passages whereby water under pressure from the runner vis forced into said chamber for the ypurpose of lubricating the bearing.

11. In a deepwell pump, a pump shell having a chamber therein, a runner in said shell having an upper wall which forms a running joint with the shell, a bearing in said shell, the upper portion of said bearing lying within said chamber, and a passage to permit the water passing said running joint to enter said chamber .and lubricate the bearing..

ll2. In a deep well centrifugal pump, the ,combination of i va pump shell, a runner mounted on a shaft and revoluble within the shell, a bearing for said shaft arranged above the runner and provided with grooves extending therethrough, means for flowing water through said grooves to lubricate the bearing, a chamber into which said water isy discharged,V and a passage, the area of which is controlled by the vertical position of the runner, connecting said chamber with the interior of the runner.

- In testimony whereof we have hereunto set our hands at San Francisco, California, this 19th day of October, 1915.

WILLIAM A.. DOBLE. oYsTEIN JAcoBsuN.

In the presence of- H. G. PROST.

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